The push rods have never been touched,as far as I know, its the bolt that holds the rocker arm in place. These bolts are stripping, as if theyve been overtightend. The mech showed me the bolt. To fix it he drilled out the threads in the head and intstalled a helicoil and used a new stud. this has happened in the #1 and #3 cylinders. Now I think its happened again. Ive never heard of this happening. The rocker arm pivot doesnt take that much pressure. right? But, these studs are getting pulled out. Ive never had any work done on the car except for the notorious leaking intake manifold gasket, that thoes engine are famous for. In fact I had that gasket replaced for the second time only 2 weeks ago. The same shop has done all the work on this car . The car was running just fine when I picked it up last time.